specifications for the structure of the Global Registration Identifier for Donors (GRID) and the Issuing Organization Number (ION);

information on how to obtain and update an ION; and,

rules on the use of the GRID.

Note: A tool for calculating the checksum based on the Issuing Organization Number (ION) and Registration Donor Identifier (RDI) entries can be found in the Lookup Tools section of the website. Click here to access the GRID Checksum Calculator.